Water heater



Feb. 15, 1944-. G. D; ARNOLD 2,341,352

WATER HEATER Filed Oct. 13, 1942 2 Sheets-Sheet 1 Inventor Feb. 15, 1944. DHARNQLD 2,341,852

WATER HEATER Filed 001.. 13, 1942 2 Sheets-Sheet 2 ycb' 7. r

" We/way 19m Patented Feb. 15, 1944 UNITED STATES eA'rENT OFFICE 2,341,852 WATER HEATER George D. Arnold, Peru, Ind. Application October 13,1942, Serial No. 461,863 3 Claims. (01. 122-159) The present invention relates to new and useful improvements in water heaters, and has for its primary object to provide an insulated casing substantially in the form of a stand boiler and having a combustion chamber surrounded by inner and outer communicating water jackets and arranged to receive cold water in the outer water jacket for circulation downwardly into the inner water jacket and upwardly in the latter for discharge from the top thereof.

A further object in this construction is to provide a water heater that will give complete circulation due to the separate path ways of the cold and hot water which will result in the elimination of condensation on the surface of the combustion chamber as well as eliminate the formation of lime and scale, due to the water moving rapidly through the entire heater at a temperature above the temperature of the incom ing water regardless of the fact that heat would not be applied to the surface.

A further object is to provide a water heater or this character of simple and practical construction, which is efficient and economical in use and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout and in which:

Figure l is a vertical sectional view, and

Figures 2 and 3 are transverse sectional views taken, respectively, on the lines 22 and 33 of Figure l.

Referring to the drawings in detail, wherein, for the purpose of illustration, I have disclosed a preferred embodiment of the invention, the

numeral 5 designates a cylindrical casing supported on legs 5 and having a water jacket 1 positioned therein and spaced from the walls of the casing 5 to provide an insulation chamber in which insulation material 8 of conventional form may be placed.

The lower portion of the jacket 1 is formed with an outer cylindrical wall 9, an inner cylindrical wall I i], and an intermediate cylindrical wall I! supported in spaced concentric relation by means of the rivets or bolts I2.

The lower edges of the walls 9 and I rest on the bottom l3 of the casing and the lower edge of the intermediate wall ll terminates above the bottom It, as shown to advantage in Figure 1 of the drawings.

The top of the inner wall I U is closed by a top plate M to form a combustion chamber l? in the bottom of which is positioned a fire pot l 6 of refractory material supported on a plate I? which forms the central portion of the bottom of the casing 5 and which is removably secured therein by means of the lugs I8. A burner I9 of conventional construction is positioned in the fire pot l6 and may be in the form of a gas burner, as shown in the drawings, or may comprise anoil burner or solid fuel heater, if desired.

Spaced above the top plate I4 is a water plate v 20 which closes the top of the intermediate wall H and spaced above the water plate 20 is a top plate 2! for the outer wall 9 of the water jacket.

The water plate 20 is formed with a central opening 22 having an upstanding flange 23 and rising from the central portion of the plate 2| is a reduced chamber 24 disposed immediately above the opening 22 of the water plate 23.

Surrounding the chamber 24 is an upper com bustion chamber 25 which is spaced from the top of the chamber 24 as well as from the sides thereof and leading from the chamber 25 is a stack 26 extending through the top of the casing 5.

A water inlet pipe 21 extends into the outer wall 9 of the water above the water plate 20, and water is admitted to the water jacket where the heat from the burner causes the water to circulate in a manner as indicated by the arrows in Figure l of the drawings. The water is withdrawn from the top of the water chamber 24 by a pipe 28 and may lead to an auxiliary storage tank, if desired.

A drain pipe 29 enters the casing at the lower portion of the water jacket.

The upper combustion chamber 25 is connected to the lower combustion chamber I 5 by means of a plurality of tubes 30 extending through the plates I 4, 20 and 2|.

It is believed the details of construction and manner of operation of the heater will be readily understood from the foregoing without further detailed explanation.

What is claimed is:

1. A water heater comprising a casing, a lower water jacket in the casing in spaced relation to the walls thereof, said jacket including an outer wall, an inner wall and an intermediate wall, said inner and outer walls extending to the bottom of the casing and said intermediate wall being supported with its bottom edge above the bottom edges of the inner and outer walls, top plates at the upper edges of each of said walls, and vertically spaced apart, said top plate of the interjacket at a point immediately 2. A water heater comprising a casing, a lower water jacket in the casing in spaced relation to the walls thereof, said jacket including an outer wall, an inner wall and an intermediate Wall; said inner and outer walls extending tothe bottom of the casing and said intermediate wall being supported with its bottom edge above the bottom edges of the inner and outer walls, top plates at the upper edges of each of said walls, and vertically spaced apart, said top plate of the intermediate wall having an opening, a reduced upper water chamber rising from the uppermost top plate open at its bottom and having communication with the lower water jacket, a stack rising from the intermediate plateat the opening therein and terminating adjacent the open bottom of the upper water chambena water supply pipe connected to the lower water jacket immediately below the uppermost top plate, a water discharge pipe connected to the upper water chamber, a heating chamber surrounding the upper water chamber, a combustion chamber centrally of the water jacket, and discharge tubes leading from the combustion chamber through the top plates of the water jacket and communicating with the heating chamber for the upper water chamber.

3. A water heater comprising a casing, a lower water jacket in the casing in spaced relation to the walls thereof, said jacket including an outer wall, an inner wall and an intermediate wall, said inner and outer walls extending to the bottom of the casing and said intermediate wall being supported with its bottom edge above the bottom edges of the inner and outer walls, horizontal plates closing the upper end of the water jacket and including an upper plate, an intermediate plate and a lower plate connected, respectively, to the outer, intermediate and inner walls, said intermediate plate having an opening, a dome rising from the upper plate having open communication with the lower water jacket and forming a reduced upper water chamber rising from the upper plate, a stack rising from the intermediate plate; at theopening thereof and terminating adjacent the bottom of the dome, a Water supply pipe connected to the lower water jacket at a point between the upper and intermediate plates, a water discharge pipe connected to the upper Water chamber, a heating chamber surrounding the upper water chamber, a combustion chamber within the lower water jacket, and tubes connecting the heating chamber with the combustion chamber.

GEORGE D. ARNOLD. 

